Machine tool for machining a workpiece

Patent metadata

Field	Value
Publication number	US-2018290249-A1
Application number	US-201615739417-A
Country	US
Kind code	A1
Filing date	Jun 22, 2016
Priority date	Jun 22, 2015
Publication date	Oct 11, 2018
Grant date	—

Abstract

A machine tool for machining a workpiece has a spindle arm with a spindle for receiving a tool or workpiece. The spindle arm is movably attached to a spindle arm receiving section. The spindle arm has a first spindle arm section, being a longitudinal element, having a first rotational axis with respect to the spindle arm receiving section and is hinged to the spindle arm receiving section; a second spindle arm section, rotatable about a second rotational axis with respect to and is hinged to the first. The spindle arm receiving section has a first subsection and a second subsection, arranged on the machine column at a distance from one another to receive the spindle arm. The first spindle arm section has first and second subsections, which are arranged on the spindle arm receiving section at a distance from each other to receive the second spindle arm section.

First claim

1 . A machine tool for machining a workpiece, comprising
a spindle arm with a spindle for receiving a tool or the workpiece, wherein for positioning the spindle in a processing area the spindle arm is movably attached to a spindle arm receiving section, which is arranged on a machine column; wherein the spindle arm for pivoting the spindle comprises: a first spindle arm section, which is designed as a longitudinal element, can be rotated about a first rotational axis with respect to the spindle arm receiving section and is hinged to the spindle arm receiving section, wherein the first rotational axis is disposed in a first end section of the spindle arm receiving section and in a first end section of the first spindle arm section; a second spindle arm section, which is designed as a longitudinal element, can be rotated about a second rotational axis with respect to the first spindle arm section and is hinged to the first spindle arm section, wherein the second rotational axis is disposed in a second end section of the first spindle arm section and in a first end section of the second spindle arm section; wherein the spindle arm receiving section comprises: a first subsection and a second subsection, which are arranged on the machine column at a distance from each other to receive the spindle arm, wherein the first subsection of the spindle arm receiving section has a first braced drive for transmitting a first torque to the first spindle arm section for a rotational movement of the first spindle arm section about the first rotational axis; wherein the first spindle arm section comprises: a first subsection and a second subsection, which are arranged on the spindle arm receiving section at a distance from each other to receive the second spindle arm section, wherein the first subsection of the first spindle arm section has a second braced drive for transmitting a second torque to the second spindle arm section for a rotational movement of the second spindle arm section about the second rotational axis.

2 . The machine tool according to claim 1 , wherein a distance between the two subsections of the spindle arm receiving section is greater than a distance between the two subsections of the first spindle arm section by arranging the first end section section of the first spindle arm section between the two subsections of the spindle arm receiving section.

3 . The machine tool according to claim 1 , wherein
the first braced drive and the second braced drive each have four mechanically braced drive elements and each have one driven element.

4 . The machine tool according to claim 3 , wherein the four drive elements of the first braced drive are arranged on the spindle arm receiving section along a circular arc with a maximum center angle of 180°; and
the four drive elements of the second braced drive are arranged on the first spindle arm section uniformly along a circle.

5 . The machine tool according to claim 1 , further comprising
a third spindle arm section which is disposed opposite the second spindle arm section, can be rotated about a third rotational axis and serves to receive the spindle as well as is hinged to the second spindle arm section, wherein the third rotational axis is disposed in a second end section of the second spindle arm section, and the second spindle arm section has a third drive for transmitting a third torque to the third spindle arm section for a rotational movement of the third spindle arm section about the third rotational axis.

6 . The machine tool according to claim 5 , wherein the first rotational axis, the second rotational axis and the third rotational axis are oriented parallel to one another, and
the machine tool further comprises:
the numeric control, which is designed to control the first braced drive at the spindle arm receiver section, the second braced drive at the first spindle arm section and the third drive at the second spindle arm section in such a way that an end section of the spindle spindle at the third spindle arm section performs a rectangular path in a plane perpendicular to the parallel rotational axes as a result of simultaneous rotational movements of the first spindle arm section about the first rotational axis, of the second spindle arm section about the second rotational axis and of the third spindle arm section about the third rotational axis.

7 . The machine tool according to claim 5 , wherein
the braced drives arranged on the spindle arm receiving section and on the first spindle arm section are designed as cycloid gears; and the third drive arranged on the second spindle arm section is designed as a cooled torque drive.

8 . The machine tool according to claim 1 , wherein
the spindle arm comprises a guiding element for running lines at a position, at which the second spindle arm section is hinged to the first spindle arm section, wherein the guiding element has a plurality of segments for separately guiding a plurality of lines.

9 . The machine tool according to claim 1 , further comprising
a rotary table at the machine frame, which can be rotated about a rotary table rotational axis and serves to receive the workpiece or the tool.

10 . The machine tool according to claim 9 , further comprising
a first linear axis for receiving the rotary table, wherein the rotary table can be moved along the first linear axis and the rotary table rotational axis is oriented at an angle between 0 degrees and 90 degrees in relation to the first linear axis.

11 . The machine tool according to claim 1 , further comprising
a second linear axis for receiving the spindle arm receiving section, wherein the second linear axis is oriented parallel to the first rotational axis and the spindle arm receiving section is movably arranged on the machine column along the second linear axis.

12 . The machine tool according to claim 1 , wherein
the first spindle arm section has a buffer section for stopping a rotational movement of the second spindle arm section in a direction to the first spindle arm section.

13 . The machine tool according to claim 1 , wherein
the machine column has a receiving area for receiving the spindle arm receiving section; a top-bottom direction is defined by a direction from a ceiling surface of an installation room for the machine tool to a stand space of the machine tool; and the spindle arm receiving section is arranged on the receiving area either above the receiving area or below the receiving area or on the side of the receiving area.

Assignees

• Deckel Maho Pfronten Gmbh

Inventors

• Kschier Uwe
• Geissler Alfred

Classifications

• Y10S901/28

  Joint · CPC title

• B23Q1/5481 Primary

  followed parallelly by a single rotating pair · CPC title

• B25J11/005

  Manipulators for mechanical processing tasks · CPC title

• B25J9/046

  Revolute coordinate type · CPC title

• Y10S901/25

  Gearing · CPC title